Machine for grading ground coffee



March 6, 1921s.r i 1,661,299

A. PERQN MACHINE FOR GRADING GRUND COFFEE f i INVENTOR March 6, 192s.

MACHINE FOR GRADING GROUND COFFEE lFiled oct. 2z, 1924 2 sheets-sneer 2 20 I I |11' l I 1a i 27 5x4 I I a l Z .5

n NVENTOR f4 1,661,299 A. PERON rpatentedv Mari '6,Y 192,84.

UNITEDSTA real ,zsig

ANTHONYPEROMOI NEW you, N. Y.y

MACHINE FQRGRADING GROUND' corran v Application led )ictober 23, 1924.V Serial 110.):74538'1.

When the coffee-bean is pulverized': or

ground Yquite fine, an..appreciable kquantityfofrj very tine powder is'produced which 1s .con-f sidered objectionableby some because of the cloudy 'oi'.imiddy,appearance it imparts to the coffee. f

. The main objects of this invention are v'tov provide simple v and practical apparatus or quicklyand elfectively removing from the ground coffee. p v

i Other objects as ywell as'the novelV fea tures of construction, Ycombination and relaf` tion of parts byfwhich the desired-results are attained will appear as the .specification proceeds., f

' In the drawings accompanying and former.

ing part of this specification, the yinvention is illustrated embodiedin .a simple, practical.

form, but it should be understood that-the structure ymayy be varied without:departure' from the' broad spirit and scope ofthe inv vention ashereinaf-ter dehnedand claimed.

i l viewL on substantially the plane 'of jlinei4 4 of Figure 1.5

l The 'body of theapparatusis*illustrated in the form of.' a vertical casing divided by upper .andvlowerfscreensjand 7 into an .intermediate receiving chamberB with aV i* conical exhaust-chamber 9. above jthe-.upper introduced surrounded :by a funnel wall .12'.

providingva charging chute. A t the bottom` ofzthis chamber., substantially` in line with `the lower screenyis a; tight fitting dischargeY and carrying a -radial v.armed brush17 riding.

over the lower screen and another radial v screen' and a .conical pressure chamber 10 below v the lowerfscreen. l v Y v The intermediate chamber has .a sliding orA other close tting gate 11 `in the upper `portion ofthe-same .throughfwhichthe coleeis gate 13 opening to aadischarge chutelt.`

. A-shaft 15 isshown supported incfbearings 16. substantially. at the vcenter of the casing armed brush-18 enga-ging the under face-of the upper screen." The lower screen 1s shown as of slightly conical formation so that when the Adischarge door 'K is 'opened,' the` brushi the powder n onal view of'the.

arms willoperate to` sweep the contents out i i l througlrthe discharge. opening This coni-.- 7

c al Aformation braces the screenagainst the pressure of the brush and. theupperscreen'A which is shown as substantially flat, is shownk I as braced bybars 19V. extending transversely across the'top ofthe same.A This upper screen also is kshown as slidably supported in ya.

guideway 2,0 .which is open at the front ofr the machine so that said screen can be withdrawn for-'cleaning purposes or for the sub-y 'A stitutvionzof screens of different mesh. a

Prior to withdrawing the `upper screentheV brush is preferably retracted, romvengagejy ment ltherewith as by means of a construction such V.as shown in detail in. F igure 3, and

comprisingvanangular. sleeve V21 at the back of thevlupperbrush head ittging overv an angul-v lar portion 22 onthe upper end of the brush;

shaft with a spring 23y interposed in the Y telescopicjoint thusprovided to pressyield-- inglyl up against vthe screen and alsoto enable a retractive lmovement of lthe brush Y head; This movement is electedin the il-k lustration by a handlever 24 on one end ofa rock shaft. 25 whichr carries a forli 26'I kwith vlugs operatingl in agroove iii-thefcol-y l i lar 27 onthe .axial `portion of the brush head. A hook 28 is shown provided onthc outside of the casing which can be engaged by thev hand lever to hold said lever down with the vbrush Y'retracted from engagement,"

with the screen'. e Thescreen may be equippedy with a suitable handle29 lasfshown inFigkv ure 2, lto envableits ready lremovaljfrom the .guide 2O in-.which itl is-Aslidablyy supported..

To provide the pressure below theflower'v screen', `a blower is shown at-f30 connected by vaY conduit 31 tothe pressure chamber l10.y A gate valve 32is shown interposed inthis conduitandfa relief valvexSB shown prof e vided ina branch 34,1ed off from one 'side of the pressure conduit.

The ,suctionjfor the eXhauSt 'chamber provided in theillustration by a suctionY blower 35' connectedv by,l conduit 36 with the exhaust chamberfin 'the top ofthe casing and. therpressuresi'de o'f'this suction fan is shown connected by'oonduit 37 with a separator 38 which mayl bej ofl'anygeneral or special construction suited tothe work of' catching and vholding ythe finer particles or.,k Y

powder which .has .thescreenf ,y

The bottom .oV-.thell casing is shown sloped to the front as at 39 and' a dischargegate 4() been passed ,upfthrough is provided atthe lowest point for discharge of the heavier material collected in the lower chamber.

The central brush shaft is shown as eX- tended down through' the bottomnofthe casing and supported in a fstepbearing 4l and is turther shown as carrying a worin gear 42' by which it is driven at relatively slow Vspeed from a worm 43.

' 'In"operation,-the coffee ground to the proper degree or finenessis charged int-o the separating 'chamberand-I with the suction and pressure creating devices in operation, the blast up through the lower screeirwill lift and separatezthe material, forcing the tine powder'up through the upper-screen,

from which it-ispositively carried oil' by theexhaust fan. 'lheexhaust draught thus supplements and aids thel compressed air in separating and carrying ofiL the pulverized material and clogging of 'the fine mesh screen by this oilyl powder is prevented by the ybrush which is constantly sweeping across the face of the screen. l

The havier granular material falls through the coarser lower screen into the lower compartment and the over-size product is' yretained in the separating chamber. lWhen the machine has Vbeeny operated for a suf'licient period to remove practically all the powder,

the exhaust aii and blower may be shut olf l `or disconnected so as to permit Vthe properly graded material to settle inthe lower com* partment from which itcan kbe removed at the door 40 and the oversize material can be then taken out at the door 13. During removal of such material the brush l''may Y continue in operation so as to sweep the material off the conical screen into the `discharge chute 14. I j

'The brush l8'prevents clogging of the fine mesh screen but this screen may be removed at any time and cleaned with air pressure by holding itover the end of the branch pipe 34. This involves simply pulling down on the'lever 24 to retractftlie upper brush?, sliding out the screen Aand `then holding the screen over the end of the blow pipe 84,`the valve 33 being then eitherwholly or partly opened and the through valve 32 being 'ordinarily closed so as to obtain the full effect oi the blower. v

fcomprisingajcasing divided by upper and lower screens into a compartmentfor intro duction of the ground coffee, air blastmcansintroduced into the casebeneath the lower screen, suction means connected with the top i compartmenti,

` verted blast.-

of the casing above the upper screen, sepa! rator connectedwith said Vvsuction means andy an outlet to the air blast compartmentbelowptherlower screen tor removing material passing through the lower screen into said 2. Apparatus for treating ground coffee,

comprisinga.casing divided by upper and lower screens into a compartment for introduction off thevground coffee,- air blastmeans introduced into the y' case beneath the Y lower screen, suction means connected `with the top of the casing'above the upper screenV 'and' valve means tordiverting the blast. l

8. Apparatus for treat-ing ground coffee, comprising a casing divided by upper andv lower screens into a compartment for introduction of the Lgrou-nd conce, air blast` means introduced into the case beneath the lower screen, suction means yconnected with the top or thecasing above-the upper screen and valve means for diver-ting theblast, one

ofi' thel sci'eens being readily removable from the casing for placement in front of thedi- 4. Apparatus forftreating comprising a casing divided by upper and lower screens into acompartmentf'or introduction off the ground coffee, air blast means introduced into lthe case beneath the lower screen, suction means connected with the of the casing above the upper screen and ro-` tatingvbrushes within the l'collec' containing compartment for cleaning ltheupper g and lower screens. Y j

5. Apparatus' of Vthe character disclosed, comprising a casing havingan intermediate compartment dened by 'upper andi'` lower screens, the upper being of fnermeshtha'n the lower-and the lower defining aA collection chamber in the bottom 'of the casing; an air:

blower having ak discharge conduit opening into the collection chamber anda suction deviceV having ai suction cond-uit 'opening into the top of the casing above the-'fine 'screen-1Q 6. Apparatus of the character disclosed,

comprising" a' casing having an intermediate compartment defined by upper and lower screens, the upper being 'of finer meshfthan" the lower and the lower defining a collectionl chamber vin the bottom Aofthecasing, an air blower having a discharge-conduit opening into the collection chamber, `a suction device having asuction conduit `openingi'ntovth'e topof:l the casing above the finescreen, an

upright shaft in' the casing fand brushes onV said shaft cooperating' withthe' screens.

7, Apparatus of the'characterdisclosed, comprismgaV casing having an intermediate compartment defined "by upper and ,lower` screens, the upper being of finerjme'sh than n the lower and the lower d eninga collection chamber in the bottom of the casing, an airblower having adischarge conduitvopenin-'g into the collectionlchamber, a suction device` `iso I ground' cofee,

having a suction conduit opening into the top of the casing above thefine screen, the pressure conduit having aL valved discharge outside the collection chamber and a valve in the pressure conduitfor closing oil' communication with the collection chamber.

8. Apparatus for removing the powdered particles from ground coffee,'compris ing a casing with powder removing and graduated coee collecting chambersand an intermediate separating chamber, said separating chamber'having means enabling the introduction of ground coffee therein,v a

powder separating screen between the separating chamber and powder removing chamber, a coffee grading screen between'the sep- Y arating chamber and' collecting chamber, an

exhauster connected with the powder removing chamber for carrying off the powder passing through the powder screen,l means V for subjecting the ground coffee in the separating chamber to the action of an air `blast to thereby facilitate separation .ofthe pow-- der therefrom, the collection chamber having means for enabling removal ofthe grad'- uated coffee therefrom and the separatingv chamber'having lmeans enabling the removal of the oversize particles left after separation from.

9; Apparatus for removing the powdered Y duction of ground coffee therein, a powder K vseparating screen l,between the separating chamber and powder removing chamber, ai coffee grading screen between the separatingV chamber and collecting chamber, an exhauster connected with the powderV remove ing. chamber for carrying ofi' the powder passing through the powder screen, means Jfor subjecting the ground coffee in the separating chamber-to the action of an air blast to thereby facilitate separation of the pow? i der therefrom, the collection chamber having means for enabhngremoval of the grad-,j uatedcoffee therefrom, the separating cham-v "ber having means enabling the removal of the oversize particles left Vafter separation of the powder and graduated coffee therec from V,and means' associated with the exhauster for collecting the removed powdered. coffee. l 1 Y In witness'whereof,r I have hereunto set :my hand this 4th day of August, 1924. of the powder and graduated coffee theref `ANTHONY PERON. 1 

